Drive-pipe.



No. 745,842. PATENTED DEC. 1, 190.3. J. A. & H. W. HOCK.

DRIVE PIPE.

APPLICATION FILED MAR. 4, 1903.

N0 MODEL.

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Q dta M y UNITED STATES JOHN A. HOOK AND HENRY W. HOOK,

Patented December 1, 1903. I

PATENT OFFICE.

OF YOUNGSTOWN, OHIO, ASSIGNORS PORATION OF NEW JERSEY.

DRIVE- PIPE.

SPECIFICATION forming part of Letters Patent No. 745,842, dated December1, 1903.

Application filed March 4, 1903. Serial No. 146,131. (No model.)

T (tZZ whom it ntay concern:

Be it known that we, JOHN A. HOOK and HENRY W. HOOK, residents ofYoungstown, in the county of Mahoning and State of Ohio,

have invented a new and useful Improvement in Drive-Pipe; and we dohereby declare the following to be a full, clear, and exact descriptionthereof.

Our invention relates to drive and like pipe-that is, to the pipe usedin making drive-wells, laying pipe-lines, due. The pipe usually employedfor this purpose has been of the ordinary type of wrought-metal pipe ofsuitable strength of body connected by the ordinary threaded joint, thesocketsin some cases having recesses at the outer edges to receive thebody of the pipe. This pipe is subjected to heavy blows from adrop-weight, as in driving piles, and in this way very consid- 2o erablestrain is brought upon the body of the pipe and upon the joint, and asthis longitudinal shock must be transmitted through the joints where thepipe has been threaded to form the joint they are of course the weakestpart, and three sources of difficulty are liable to ocour-first, thethread itself is liable to strip under the blows, spoiling the joint;second, the body of the pipe at a point a short distance above thesocket is liable to bulge outward under the blows of the drop-weight,and this tends to cause the pipe at a point near the end of the socketto bend inward, which causes the thread of the pipe to leave the threadof the socket, leading to leakage and in some cases causing deflectionof the pipe from the straight line through the slipping or stripping ofthe joint on one side, which gives the well-driller trouble and in manycases makes it necessary to withdraw 0 the pipe from the well, in whichcase itis cast aside as defective, and quite often the hole itself hasto be abandoned at alarge expense to the operator and owner; third, thedrivepipe itself will break under the severe shocks in driving, in whichcase the main point of weakness is found to be where the thread ends onthe pipe, which cannot well be covered by the socket, and even ifcovered by the recess of the socket there is not a suffi- 50 cientlytight connection between such wall of the recess and the wall of thepipe to overcome the weakening through such threading. Similardilficulties have been found in connection with line-pipe, wherepeculiar lateral strains are brought upon the'same on account ofvertical or lateral curves in the laying of the line,which strain hasbeen liable to loosen the joints, these being the weakest parts of theline.

The object of our invention is to overcome these difficulties in thisparticular class of pipe and to strengthen the body of the pipe at thejoint and relieve the threads of the pipe and socket from the greatlongitudinal strain. 7

To these ends the invention consists in the combination of apipe-section having a thread ed end portion and beyond and close to thesame an encircling band rigidly secured thereto and extending radiallybeyond the threaded portion and a pipe-coupling engaging with thethreaded portion, such encircling band reinforcing and supporting thepipe against the bulging action above referred to and holding the bodyof the pipe straight and, if desired, the band contacting with the bodyof the socket and carrying the longitudinal strain of the blows of thedrive-weight through the socket and relieving the threads therefrom.

To enable others skilled in the art to makeand use our invention, wewill describe the same more fully, referring to the accompanyingdrawings, in which- Figure 1 is a side view of adrive-pipe having theinvention applied thereto. Fig. 2 is a cross-section of the same,illustrating the invention in connection witha threaded joint; and Fig.3 is a like sectional view showing the bands secured to the pipe inanother way. 0

The drive-pipes 1 and 2 may be connected by any suitable coupling-socket3, the joint illustrated between the coupling-socket and the drive-pipebeing the usual threaded joint, the socket having the recess 4: at theend to 5 receive the upper or vanishing portion of the threads.Encircling and rigidly secured to the drive-pipe beyond but close tosuch coupling-socket are the reinforcing-bands 5 and 6, which, asillustrated, are made of about the loo intended, being shown as aboutone-third the height or length of the coupling-body. They may be securedto the body of the pipe in any suitable way, and the means employed forsecuring the bands in position will of course depend upon the size andcharacter of the pipe and strain to which it is subjected. For most usesthe most desirable way of securing the bands in position is by,shrinking them upon the pipe, the bands being heated and when so heatedslipped over the body of the pipe to the proper position thereon and inshrinking upon the same forminga rigid joint therewith sufficient tosustain practically all strains. Such construction is shown in Fig. 2.For very heavy pipe or where the same is subjected to the greateststrain, such as in driving through hard substances, these pipes being insome cases used where a hundred or more blows are required to advancethe same as much as an inch, it may be desirable to weld thereinforcing-bands to the pipe, and for that purpose both the pipe andthe bands may be raised to a welding heat and the bands slipped aroundthe pipe and firmly welded thereto before the threading of the ends ofthe pipe. The bands may also be'secured by wedging or other means. It isdesirable for some kind of drive-pipe that the bands shall comeintoactualcontact with the socket-body, as illustrated in the drawings, soas to transmit the shock from one drive-pipe to the other through thebody of the coupling without subjectingthe threads or other couplingdevice to the severe strains or blows or to some extent to relieve thesame of such strain. For ordinary purposes the bands may be located andsecured in place without the necessity of turning the faces of suchbands; but, if desired, the bands may be secured to the drive-pipebefore threading and as part of the threading operation the faces of thebands be turned to insure an accurate and proper contact with the edgeof the coupling.

In the use of the invention the drive-pipe are screwed or otherwisesecured within the coupling-socket and by preference the inner faces ofthe bands brought into contact with the ends of the coupling-socket, asabove set forth, and the pipe are driven in the ordinary way. When soused, as the bands encircle the pipe at about the point where the pipeare liable to bulge, as above described, and as the bands reinforce thesolid or threaded walls of the pipe at about this point they sustain thepipe against such outward bulging action and in so doing prevent theinward bulging of the threaded portions of the pipe within the joint,and thereby overcome the tendency to stripping of the joint and theleakage or deflection of the pipe in driving, as above described. Wherethe bands contact with the coupling-socket,the jars in driving aretransmitted through the reinforcingbands of the upper pipe to the socketand from that socket to the reinforcingbands of the lower pipe, sorelieving the threaded or otherjoint connection between the pipes frompractically all this strain and preventing stripping of the threads ordisengaging of the coupling devices. Practically the same advantages arefound in connection with linepipe and other pipe used in like positions,as the bands will strengthen the pipe at the joints and prevent collapseof the same under the lateral strains, and where the bands contact withthe coupling they will impart such strength to the same as against suchlateral strains as will prevent undue deflection of the line at thejoints as compared with the body of the pipe.

\Vhat we claim is 1. In drive or like pipe, the combination of apipe-section having a threaded end portion and beyond and close to thesame an encirolingband rigidly secured thereto and extending radiallybeyond the threaded portion, and a pipe-coupling engaging with saidthreaded portion.

2. In drive or like pipe, the combination of a pipesection having athreaded end portion and beyond and close to the same an encircling bandrigidly secured thereto and extending beyond the threaded portion, and apipe-coupling engaging with the threaded portion, the reinforcing-bandbeing adapted to engage with the end of the socket when the joint isformed.

3. In drive or like pipe, the combination of a pipe-section having athreaded end portion and beyond and close to the same an encircling bandwelded to the pipe-body and extending radially beyond the same, and apipecoupling engaging with the threaded portion.

In testimony whereof we, the said JOHN A. HOOK and HENRY XV. HOOK, havehereunto set our hands.

JOHN A. HOOK. HENRY W. HOOK. \Vitnesses:

JOHN M. ROSIE, W. D. VAN HORN.

